289320447 has 8 divisors (see below), whose sum is σ = 415434544. Its totient is φ = 178043328.

The previous prime is 289320439. The next prime is 289320461. The reversal of 289320447 is 744023982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289320447 - 2³ = 289320439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 7418473 = 289320447 / (2 + 8 + 9 + 3 + 2 + 0 + 4 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289320407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3709198 + ... + 3709275.

It is an arithmetic number, because the mean of its divisors is an integer number (51929318).

Almost surely, 2^289320447 is an apocalyptic number.

289320447 is a deficient number, since it is larger than the sum of its proper divisors (126114097).

289320447 is a wasteful number, since it uses less digits than its factorization.

289320447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7418489.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 289320447 is about 17009.4223005956. The cubic root of 289320447 is about 661.3931751154.

The spelling of 289320447 in words is "two hundred eighty-nine million, three hundred twenty thousand, four hundred forty-seven".